The EAGLE 1300 provides the missing link in alarm system protection. The 1300 can be used on a 24-hour circuit to provide constant monitoring of the phone lines. When installing in business locations, the 1300 can be connected to the perimeter circuit if interruptions are not desired during the business day. The model 1300 monitors both telephone line voltage and current, thus making it less susceptible to false tripping. If the line voltage drops below 1.5V, then the 1300 monitors the line current. If current is still flowing, the signal is ignored. If there is no current present for more than 120 seconds (60 seconds is also selectable), then the relay switches to the alarm state. Upon line restoral, the trip relay automatically resets.